Apparently not a single education reporter for the BBC, The Times, The Telegraph, The Sun or The Daily Mail actually know how A-level exam grades are awarded. And I suspect if I looked at other news sites, I would find the same (depressing) result.
A level grades are not given out solely based on percentage of marks gained in an exam! If this years A-level maths is truly easier than last years, then candidates will need to score more marks to get an A. If this years paper is harder than last years, then candidates will need to score less marks. It’s simply not possible for them to write papers of the same difficulty each year. Even in subjects like maths, they can’t simply take the previous papers and change the numbers in the questions, because then people would simply need to learn the techniques tested in the previous years papers, and not the entire syllabus.
The confusion arises because people do like to compare things from one year to the next. Most people would agree that someone getting 86% on an ‘easy’ paper has less knowledge than someone who got 78% on a ‘hard’ paper. In fact the 86% might have been a B, but the 78% was worthy of an A…
Because of this the exam boards map the raw marks onto something called the UMS (uniform mark scale). So someone who scored the minimum marks for an ‘A’ on their particular year’s exam will receive 80/100 on the UMS. Someone who scored halfway between the grade boundaries of ‘A’ and ‘B’ for their particular year, will receive a UMS score of 75/100. Students receive their UMS score, not their raw marks. IQ tests work in a similar way - the actual ’score’ given by a test depends on the difficulty of the particular test, and not just how many questions you got right.
You can’t say that a UMS score of 80/100 is 80%. The numbers just don’t work that way.
QCA even explain this themselves…
Whether or not the standards expected for a particular grade have gotten softer over the years is another matter entirely…

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